Prunus armeniaca vs apricot

Prunus armeniaca and apricot both are nouns.

Word	Noun	Adjective	Verb	Adverb
Prunus armeniaca	Yes	No	No	No
apricot	Yes	No	No	No

As nouns, apricot is a hypernym of Prunus armeniaca; that is, apricot is a word with a broader meaning than Prunus armeniaca:

Prunus armeniaca: temperate zone tree bearing downy yellow to rosy fruits
apricot: Asian tree having clusters of usually white blossoms and edible fruit resembling the peach

Other hypernyms of Prunus armeniaca include apricot tree.

Prunus armeniaca (noun)	apricot (noun)
temperate zone tree bearing downy yellow to rosy fruits	a shade of pink tinged with yellow
	downy yellow to rosy-colored fruit resembling a small peach
	Asian tree having clusters of usually white blossoms and edible fruit resembling the peach